NVS-3 is a high-pressure carbon floating ring seal designed for equipment handling medium- and high-pressure gases. It provides reliable sealing for demanding gas-handling applications and helps control leakage under high-pressure operating conditions.NVS-3 is mainly used in medium- and high-pressure gas-handling equipment. Typical applications include Roots blowers, high-pressure steam compressors, centrifugal compressors, and other rotating equipment handling pressurized gases.
Integral Carbon Seal Ring with Titanium Retaining Band
The carbon seal ring features a one-piece integral design with a titanium retaining band. The retaining band helps prevent carbon ring fragmentation during operation and improves overall operational safety. This structure provides stable sealing performance in high-pressure applications.
Belleville Spring for Reduced Leakage
A Belleville spring is incorporated into the sealing face to maintain close contact between the sealing faces. The spring force helps compensate for face separation and reduces leakage during operation. This design improves sealing reliability under medium- and high-pressure conditions.
Integral Seal Cover and Axial Installation
The seal cover features a one-piece integral design and must be installed axially as a complete assembly. This structure simplifies the overall seal configuration and ensures proper positioning of the sealing components during installation.
Multi-Stage Pressure Reduction
NVS-3 uses a multi-stage pressure reduction principle to gradually reduce the pressure across the sealing stages. This design helps achieve reliable sealing performance when handling high-pressure gases.
Application Selection
1. Different numbers of floating seal rings can be selected according to the operating conditions:
- NVS-3-II: Two floating seal rings, suitable for air or process gases where leakage requirements are not strict.
- NVS-3-III: Three floating seal rings, suitable for general non-hazardous process gases.
- NVS-3-IV: Four floating seal rings, suitable for low-pressure hazardous process gases.
- NVS-3-V: Five floating seal rings, suitable for low- to medium-pressure hazardous process gases.
- NVS-3-VI: Six floating seal rings, suitable for medium-pressure steam and equipment conveying medium-pressure hazardous process gases.
- NVS-3-VII: Seven floating seal rings, suitable for medium- to high-pressure steam and hazardous process gases.
2. The seal can be used together with the API Plan 74 system manufactured by Novseal Technology.
